Here’s how I marked external links using CSS throughout my blog with a few simple selectors one of which is a level 3 meaning this solution will probably fail in some version of IE and other browsers with limited CSS3 support. a { background: url('') right center no-repeat; padding-right: 14px; } a[href^=""], a[href^="/"], a[href^="#"] { background: none; padding-right: inherit; } The first...